The invention relates to a transformer heat dissipation device, which comprises a first heat conduction part, a radiator and a second heat conduction part. The first heat conduction part comprises a first end and a second end which are oppositely arranged. The first end is arranged in a through hole and adjacent to an iron core, and/or the first end is arranged inside a coil body. The radiator isarranged at the second end. The second heat conduction part is clamped between the radiator and the second end. Thus, the heat generated by the coil body passes through the first heat conduction partand the second heat conduction part in turn, and is finally transferred to the radiator and dissipated through the radiator. The transformer heat dissipation device can dissipate the heat generated during the operation of a transformer in time, so as to reduce the temperature during the operation of the transformer, avoid the aging of the insulation material in the transformer, reduce the possibility of transformer damage and prolong the service life of the transformer. In addition, the transformer heat dissipation device is more energy-saving and environment-friendly than a fan.